Hello all,

 

2 days ago, I received a Lindy 32115 adapter in order to get OS-Level HDR to get streamed over Gamestream/Moonlight from the KVM. It mostly works fine but I have a strange issue.

 

The Lindy support think that its the KVM that is the culprit and they asked me to remove the adapter from the KVM and test it in a real computer but I won't be able to get physical access to the machine until next week so I thought of dropping a question here in the mean time.

 

So Windows do see the dongle as my LG C2 TV that I cloned it with and all the modes/refresh rates/resolutions are available, including HDR. The problem is that if I activate HDR, I can choose up to 1920x1080 on Windows Desktop and everything higher gets me either back to 1920x1080 or drops me to 1024x768... If I disable the HDR, then all resolutions work fine again.

 

Now the interesting part: it works fine with all resolutions from within the games including the OS-Level HDR ones like Forza Horizon 5.

 

So since the adapter seems to do its job, can it really be the VM that is not working correctly?

 

Some more context:

 

Windows 11 pro 22H2 and passthrough RTX 3070

 

Thanks in advance 

 

 

Edited December 2, 20223 yr by m33ts4k0z

Actually I tested locally today and indeed the problem is with the VM. When I connected the adapter to my PC, it worked perfectly fine with streaming to it. I have looked a lot online but didn't find any answers. I even tried cloning another TV with HDR, but again it doesnt work with UNRAID VM but works in a real computer.

So after a lot of research, I found out the reason and the way to fix it.

 

I noticed that I was able to do 4K@30Hz HDR but not 4K@60Hz HDR.

 

So what I did was to use the Custom Resolution Utility to inspect things at adapter level.

 

After clicking edit on the Extension Block CTA-861, I noticed that for some reason, the Lindy dongle was reporting support for just HDMI 1.4:

 

So what I did was to click Add... in that menu and add a new HDMI 2.x block and click ok:

 

And that allowed me to do 4K@60Hz HDR.

 

I also think that although the Lindy adapter doesn't support it since it's HDMI 2.0, someone can go even higher at 120Hz with this method by just adding a HDMI 2.1 feature like Maximum FRL Rate @ 48Gbps. That will enable the graphics card to send using HDMI 2.1 so that the software like Moonlight can capture it even if the adapter doesn't support it. Of course, I suppose, someone would need a graphics card that supports HDMI 2.1 like the RTX 30xx series.

Edited December 13, 20223 yr by m33ts4k0z

I have a similar problem, but I can't fix it
 

I connect directly to my TV, if TV on and HDR is on and any resolution HDR will work

 

But when I turn off the TV, the resolution is reduced to 1024x768 + HDR, if HDR is turned off, the resolution can be adjusted in any case

TV:  SONY  X90J  4K 120hz HDR 
PC: WIN11 + RTX 3080Ti,  HDMI

IPAD Mini6(2688x1488 60hz),  sunshine + moonlight

Edited February 9, 20233 yr by think2023

On 2/9/2023 at 7:34 AM, think2023 said:

I have a similar problem, but I can't fix it
 

I connect directly to my TV, if TV on and HDR is on and any resolution HDR will work

 

But when I turn off the TV, the resolution is reduced to 1024x768 + HDR, if HDR is turned off, the resolution can be adjusted in any case

TV:  SONY  X90J  4K 120hz HDR 
PC: WIN11 + RTX 3080Ti,  HDMI

IPAD Mini6(2688x1488 60hz),  sunshine + moonlight

Hello,

 

Sorry for the late reply, I just saw your message. Im not that sure how that TV behaves when turned off. If it has an always ready function like the LG C2 does, you could probably turn it on, turn the TV off and still be able to use HDR properly. However if it's completely turned off, Im not that sure if CRU will help you. Maybe you need an HDR USB dongle instead.

Edited April 25, 20233 yr by m33ts4k0z